AGA - American Gem Analysis Lab

AGA - American Gem Analysis Lab AGA Lab is an intl gemstone testing laboratory specialized in comprehensive gemstone analysis report.

Ruby or Sapphire? Two iconic gems, one family.Both born from corundum, but colored by different elements—chromium ignite...
17/05/2025

Ruby or Sapphire? Two iconic gems, one family.
Both born from corundum, but colored by different elements—chromium ignites the red of rubies, while iron and titanium bring sapphires to life in endless shades.

Explore the science behind their sparkle and see what sets them apart, gemologically.

Specimen Arrival at AGA Lab Emerald (Be₃Al₂(SiO₃)₆), Type III GemstoneNew to our reference collection: an uncut emerald ...
11/05/2025

Specimen Arrival at AGA Lab

Emerald (Be₃Al₂(SiO₃)₆), Type III Gemstone
New to our reference collection: an uncut emerald crystal exhibiting well-defined hexagonal prismatic habit, typical of the beryl family. This specimen, believed to originate from Zambia, shows vibrant green saturation attributed to chromium and/or vanadium trace elements.

Initial 10x microscopic inspection reveals multiphase inclusions and growth zoning consistent with natural, untreated formation. As a Type III clarity gemstone, inclusions are expected and diagnostically significant.

Detailed gemological analysis is underway at AGA Lab, including refractive index (RI), specific gravity (SG), UV fluorescence response, and FTIR spectroscopy to assess potential origin and treatment history.

Tanzanite, a rare and exquisite gemstone, is prized for its unique trichroic color properties, displaying violet, blue, ...
02/12/2024

Tanzanite, a rare and exquisite gemstone, is prized for its unique trichroic color properties, displaying violet, blue, and burgundy hues depending on the angle. Found exclusively in Tanzania near Mount Kilimanjaro, it is a thousand times rarer than diamonds and highly valued by gemologists for its beauty and significance.

DecemberStone | Tanzanite | Gemology | Laboratory | AGALab

Topaz, the birthstone for November, is a gem prized for its hardness—ranking 8 on the Mohs scale—and crystal clarity, wh...
02/11/2024

Topaz, the birthstone for November, is a gem prized for its hardness—ranking 8 on the Mohs scale—and crystal clarity, which often results in flawless stones.

This aluminum silicate mineral can form in a wide array of colors, though golden yellow, imperial orange, and pink are especially sought after. Known to crystallize in orthorhombic formations, topaz often grows in pegmatites and high-temperature quartz veins, making it a fascinating study in gemology.

Throughout history, it’s been believed to bring warmth, healing, and abundance to its wearer—qualities fitting for the rich tones of autumn.

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Room 4F6, 4th Floor (Phase 2), BIS Building (Warner Tower), 119 Mahesak Road
Bangkok
10500

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จันทร์ 10:00 - 18:00
อังคาร 10:00 - 18:00
พุธ 10:00 - 18:00
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